diff --git a/cool-blog/index.md b/cool-blog/index.md
index 2cf4a34..af13676 100644
--- a/cool-blog/index.md
+++ b/cool-blog/index.md
@@ -3,3 +3,4 @@
 hi
 
 * [hello](hello)
+* [types](types-rust-ts-java)